SONY DRU-710A Dual DVD±RW Recorder - Page 7

For the test procedure we used three audio discs with different audio copy protections. The ripping process for all protected audio discs was carried out with Exact Audio Copy v0.9beta5.

The tested protected audio discs were:

• Sony's Key2Audio from "Celine Dion - New Day Has Come"
• Cactus Data Shield 200 from "Natalie Imbruglia - White Lilies Island"

The Cactus Data Shield 200 protected CD contains artificial errors that are not easily bypassed by readers, while the Key2Audio protected CD contains a second session, causing problems for readers when they try to read the Table Of Contents (TOC).

The sequence of tests are:

• Recognition of the inserted disc (Yes/No)
• Ripping all wavs (with EAC's Burst Mode) to the hard disk with copy&compare function.
• Hearing the produced wavs for any click/skips.

The DRU-710A recognized the 12 Audio tracks of the CDS200 protected disc,

and with the "Retrieve Native TOC" option removed, the drive recognized the 13th data track.

The test results are shown in the following table:

The SONY DRU-710A will rip both Key2Audio/CDS200 protected audio discs. Both discs were recognized and their contents were ripped at the maximum speed. However, the drive may not rip 100% accurately CD200 protected discs since EAC reported timing problems and at the same time, the Read&Test CRC check comparison was not the same for corresponding tracks. No problems were noted with Key2Audio discs.

• Cactus Data Shield 200.0.4 - 3.0 build 16a (Aiko Katsukino - The Love Letter)

This is a "special" CDS200 build, since it doesn't contain any artificial errors during the ripping process. Most problems occur when trying to write the ripped wav files, since the produced CD-R disc contains C2 and CU errors! This "problem" is rumored to be connected to specific chipset weaknesses..

We ripped the disc contents with EAC and burned the produced wav with the latest Nero version as AudioCD+CD-Text. The burned media was checked for C1/C2 errors with PlexTools/KProbe software using Plextor PX-712A (firmware v1.02) and LiteOn LDW-811S (firmware vHS0Q).

• C1C2 Error rate from PleXWriter PX-712A (8X CLV reading speed)

• BETA/Jitter Error rate from PleXWriter PX-712A

The C1/C2 error graphs indicate that the drive didn't manage to produce a 100% error free disc.

Lets try to extract all wav files with the Plextor PX-712A and PlexTool DAE Error Correction 5th Level enabled:

No errors were reported after extracting all files, despite the high C2 spike reported by PlexTools at around the 6 minute mark. The drive's error correction mechanism corrected the errors.